Trolley.



- G. PRIVKLSZKL TROLLEY.

APPLICATION FILED JUNE 10, 1911.

Patented Dec.5, 1911.

fNVE/V 701a.

WITNESSES.-

M M 6 n w 5 o 2 m 1 UNITED STATES PATENT OFFICE.

GUSZTAV FRIVALSZKY, OF CHICAGO, ILLINOIS.

TROLLEY.

Specification of Letters Patent.

' Patented Dec. 5, 1911.

Application filed June 10, 1911. Serial No. 632,309.

To all whom it may concern:

Be it known that I, GUsz'rAv FRIvALszKY, a subject of the King ofHungary, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Trolleys,of which the following is a specification, reference being had thereinto the accompanying drawmg.

This invention relates to trolleys, and the objects of my invention are:First, to furnish a trolley pole with a pivoted harp having a revolubletrolley wheel that is normally maintained in the vertical plane of atrolley pole by retractile springs connecting the pole and the harp,whereby the trolley wheel can readily adjust itself to a curved sectionof trolley wire. Second, to provide a trolley harp with a wide Wheelhaving devices adapted to facilitate the placing of the wheel inengagement with a trolley wire and the retaining of said wheel upon thewire. Third, to provide a harp and wheel that can be advantageously usedupon high speed suburban railways where curved sections of track, heavygrades and irregularities are encountered that often cause thedisplacement of a trolley wheel relative to the wire. Fourth, to providea trolley harp and wheel that are simple in construction, easy toinstall and maintain in an operatable condition.

I attain the above objects by a mechanical construction that will behereinafter specifically described and then claimed, and reference willnow be had to the drawing, where- 1n: Y

Figure 1 is a side elevation of the trolley, Fig. 2 is a front elevationof the same, partly broken away, and Fig. 3 is a plan of the trolleyupon a reduced scale, illustrating the manner in which the wheel ridesinto engagement with the trolley Wire.

The reference numeral 1 denotes a portion of a trolley pole and mountedupon the upper end of the pole is a socket 2 having a bearing member 3which is rectangular in cross section. The upper end of this member isbifurcated, as at 4 to provide oppositely disposed arms 5 and these armsare apertured to receive a pivot pin 6, which is retained within theapertured arms by cotter pins 7 mounted in the ends of the Pivotallymounted upon the pin 6 between the arms 5 is the lower reduced andflattened end 8 of the shank 9 of a harp 10. The

harp 10 is substantially circular in elevation and has the upper endthereof enlarged, as at 11 and apertured to receive a journal pin 12.The journal pin 12 is retained in the harp by washers 13 arranged uponthe outer ends of the pin, nuts 14: screwed upon the ends of the pin,and cotter pins 15 mounted in the ends of the'pin.

Arranged upon the pin 12 are washers 16 and revolubly mounted upon thepin' between the washers is a wide trolley wheel 17. This wheel has awide annular groove 18 V-shaped in cross section, said wheel having aformation as though two frusto-coniv,

The harp 10 at diametrically opposed sides of the shank 9 is providedwith arms 24, these arms being disposed at a radius having the samecenter as the curve upon which the harp is described. The lower ends ofthe arms 24 are apertured and connected to said arms are the upper ends25 of coiled retractile springs 26, these springs having the lower ends27 thereof connected to apertured lugs 28, carried by oppositelydisposed faces of the bearing member 3. These springs are of equaltension and are adapted to normally maintain the shank 9 in longitudinalalinement with the bearing member 3 and the pole 1, whereby the harp 10will be properly positioned to retain the bottom of the groove 18 inengagement with a trolley wire 29.

It is a well known fact that on a straight section of track, the trolleywire is supported centrally of the rails of the track, and the wheel isnormally maintained in alinement with the pole by the springs of theharp, whereby the wheel can easily travel upon the wire, but when curvedsections of track are encountered, the trolley wire is often positionedin a vertical plane closer to the inner rail of the track than to theouter rail, consequently it is necessary for the harp to tilt in adirection toward the inner rail of the curve, whereby the wheel will benormally maintained in engagement with the trolley wire.

Should the trolley wire 29 have a tendency to ride off of the wheeltoward either of the heads 19, one of the spiral beads 22 or 23 willcause said wire to ride back into the bottom of the groove 18. Theprojections 20 of the heads 19 prevent the trolley wheel from riding offthe Wire 29.

What I claim is 1- In a trolley, a harp, a journal pin carried by saidharp, a wide trolley Wheel revolubly mounted upon said pin and having anannular groove V-shaped in cross section,

heads carried by the ends of said wheel, radially disposed equallyspaced projections carried by said heads, and spirally arranged beadscarried by the periphery of said wheel at each side of the centerthereof and having the inner convolutions terminating at a point removedfrom the bottom of the groove of said wheel and the outer convolutionsterminating at the inner sides of said heads.

In testimony whereof I atfix my signature in the presence of twowitnesses.

GUSZTAV FRIvALszKY.

Witnesses:

JosEF TAIFER, LEJFAR ALAJos.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

